Now now, let’s not be normative about the speed of facial hair growth. Some people take longer filling in their mustache and beards than others, and this could easily be something like 17 days if Boimler has particularly slow and/or sparse facial hair.

I would agree with you, if not for the fact that we’ve already seen Boimler’s facial hair potential in Beardler. Unless that alternate universe iteration of Boimler was using some sort artificial hair growth enhancement, it was naturally quite full, which would indicate to me that prime universe Boimler has that same potential.